$folders = $session.EnumerateRemoteFiles(
    $remotepath, $Null, [WinSCP.EnumerationOptions]::MatchDirectories)
foreach ($folder in $folders)
{
    if ($folder.Name -ne "backup")
    {
        $session.MoveFile(
            $folder.FullName,
            [WinSCP.RemotePath]::Combine($backuppath, $folder.Name))
    }
}

$transferOptions = New-Object WinSCP.TransferOptions
$transferOptions.FileMask = "| backup/"
$transferResult =
    $session.GetFiles($remotepath, $localpath, $False, $transferOptions)

$localpath = "C:\Temp\Download\"
$remotepath = '//*'
$remotepathbackup = '/backup/'
 
$session = New-Object WinSCP.Session
 
    try
    {
        # Connect
        $session.Open($sessionOptions)
 
        # Download files, collect results
        $transferResult = $session.GetFiles($remotepath, $localpath)
 
        # Iterate over every transfer
        foreach ($transfer in $transferResult.Transfers)
        {
            # Success or error?
            if ($transfer.Error -eq $Null)
            {
                Write-Host "Download of $($transfer.FileName) succeeded, moving to backup"
                # Upload succeeded, move source file to backup
                $session.MoveFile(($transfer.FileName), $remotepathbackup)
            }
            else
            {
                Write-Host "Upload of $($transfer.FileName) failed: $($transfer.Error.Message)"
            }
        }
    }
    finally
    {
        # Disconnect, clean up
        $session.Dispose()
    }
 
    exit 0
}
catch
{
    Write-Host "Error: $($_.Exception.Message)"
    exit 1
}